Asymmetric Neber Reaction in the Synthesis of Chiral 2-(Tetrazol-5-yl)-2H-Azirines
作者:Cláudia Alves、Carla Grosso、Pedro Barrulas、José A. Paixão、Ana L. Cardoso、Anthony J. Burke、Américo Lemos、Teresa M. V. D. Pinho e Melo
DOI:10.1055/s-0039-1691533
日期:2020.4
for the synthesis of chiral 2-tetrazolyl-2H-azirines has been established, resorting to organocatalysis. The protocol involves the in situ tosylation of β-ketoxime-1H-tetrazoles followed by the Neber reaction, in the presence of chiral organocatalysts. Among the organocatalysts studied a novel thiourea catalyst derivedfrom 6β-aminopenicillanic acid afforded excellent enantioselectivities.